Shielded ash spraying device



2 May 17, 193s. v E, WEBR 2,117,865

SHIELDED ASH SPRAYING DEVICE ATTORNEYS.

May 17, 1938. E. WEBER I 2,117,865

SHIELDED ASH SPRAYING DEVICE Filed May 8, 1936 3 Sheets-Sheet 2 INVENTOR.

'"M/L ifi/555,?.

ATTORNEYS.

May 17, 1938. E. wEBE-R 2,117,865'

SHIELDED Asn SPRAYING DEVICE Filled May 8, 1936 I5 Sheets-Sheet 3` ATTORNEY.

Patented May 17, 1938 UNITED y STATES PATENT GFFHQE SHIELDED ASH SPRAYING DEVICE Emil Weber, Evansville, Ind.

Application May 8, 1936, Serial No. 78,647

14 Claims.

This invention relates to a spraying device for spraying ashes in a furnace, boiler, stove, or the like, wherein coke, coal or wood-in other words, solid fuel-is utilized for the generation of heat.

It has heretofore been proposed to utilize water for spraying ashes in order to lay the dust incident thereto. However, such proposals have inherent objections, among which may be mentioned the following by way of example.

In certain devices, the spraying is continuous whereas ash deposition at least relative to quantity is not continuous. In other devices, the spraying liquid is manually and independently controlled relative to the volumetric movement of ashes. Subsequent failure to manually close the supply valve .then results in flooding of the ash pit or ash receiver.

The major dust objection incident to ash discharge, is that when shaking the fuel supporting grates of the stove, furnace, boiler or the like, such shaking action results in the mass removal of ashes from the fire zone to the ash pit or receiver and the shaking is accompanied by a large cloud of ash dust.

The purpose of the invention is to lay this dust. In heat generating devices of this character, the incidental and continuous minor discharge of ash and dust from the fire bowl to the ash pit or receiver, does not ordinarily create a cloud of dust that is objectionable and consequently, the present device is intended to function only Whenever there is co-incidentally created by grate shaking a relatively large amount of dust in the discharge of a relatively large amount of ash from there bowl.

Also, this invention is directed to a foolproof arrangement, wherein first, the spraying liquid control is automatically actuated by and with the shaking of the grates so that when the 40 grates are not shaken, there is no spraying medium discharged from the device.

Another foolproof arrangement consists in protecting the discharge ports of the spraying device from the deposition of ashes, dust and the like during all intervals when shaking of the grate does not take place and this prevents clogging of the ports. For this purpose, there is associated with the spraying device a port guarding shield which, upon shaking of the grate, is moved to expose the ports so that the spraying medium may be discharged through the ports for the accomplishment of the function of the device, to-wit', the laying of the dust.

Other advantages will appear more fully hereinafter.

(Cl. 11o- 171) The chief object of the invention is to provide a spraying device for ashes discharged from the re bowl of a furnace, boiler, stove, or the like, and which is substantially foolproof, has a relatively long life and has many advantages over other devices heretofore employed in an attempt to accomplish substantially the same purpose.

One feature of the invention in addition to the accomplishment of the foregoing object, consists in the construction of the device so that it may be readily applied as an attachment to standard furnaces, boilers, stoves, and the like.

The full nature of the invention Will be understood from the accompanying drawings and the following specification and claims:

In the drawings,

Fig. lis a top plan view of the ash pit portion of the invention embodied in a furnace.

Fig. 2 is a sectional view thereof taken on line 2-2 of Fig. 1 and viewed in the direction of the arrows.

Fig. 3 is a view similar to Fig. l and of a modied multiple form of the invention shown applied to a slightly different form of heat generator.

Fig. 4 is a sectional view taken on line 4 4 of Fig. 3 and viewed in the direction of the arrows.

Fig. 5 is a top plan view of a modied form of the invention, somewhat similar to that shown in Fig. 3 but applied to a heat generator of the general type shown in Fig. 1.

Fig. 6 is a sectional view taken on line 6-6 of Fig. 5 and viewed in the direction ofthe arrows.

Fig. 7 is a View of a portion of the device illustrated in Fig. 3 shown in larger scale.

Fig. 8 is an elevational view thereof.

Fig. 9 is a side elevation of a dust protected spray pipe, parts being shown in spraying position.

Fig. 10 is a top plan view thereof.

Fig. 11 is an end view thereof.

Fig. 12 is an elevational view of the connecting block between the shaker bar, valve and sliding shield operating connection.

In Figs. 1 and 2 of the drawings, 2G indicates a furnace structure, 2| a diagrammatic indication of a furnace grate, I 9 the ash pit therebeneath, and 22 the grate shaker member which is of reciprocatory character. A supply pipe 23 is adapted to supply water to a spray device positioned within the ash pit and above the bottom thereof and relatively close to the furnace grate, as shown in Fig. 2.

'I'he supply pipe 23 includes a manual regulating valve 24 and an automatic valve 25. The automatic valve 25 has an exposed stem 28 and concentric therewith is the spring 26 which bears against a pair of nuts 21 to normally return the member 28 to the cutoff position. A spray portV protecting ash shield moving member 32 is, in this instance, secured to the exposed portion of stem 20 by means of nuts 2l. The end of stern 20 is positioned adjacent one end of a member 20 pivoted at 33 upon a boss 3|, or the like, and which is stationary relative to the furnace.

The other end of member 29 is adapted to engage a stop portion 33 carried by the shaker member 22. Thus, when member 22 is reciprocated to and fro in each movement of the member toward the back of the furnace, the abutment 33 engages one end of member 29 and this actuates portion 28 to open the Valve so that there is supplied to the spray device within the furnace a supply of water under hydrant pressure, unless such pressure be reduced by means of regulating valve 24.

Before proceeding to a detailed description of the spray device and the ash guard shield assembly, reference first will be had to other forms.

In Figs. 3 and 4, |20 indicates the interior of a furnace structure having an ash pit H9, the grate being diagrammatically illustrated and indicated by the numeral |2| and the grate shaking member by the numeral |22.

In this form of the invention there are two spray pipe structures and the supply pipe thereto is indicated by |23 and includes the automatic valve |25. The pipe also includes the regulating valve |24, a T |23a and two branches |232), each of which communicates with a spraying device, hereinafter to be described in detail.

In this form of the invention, the shaking member |22 suitably supports a connecting member |40-see also Fig. l2-which is operatively associated with the extension |28 of the valve |25. There is no spring in this form of the invention-see Figs. '7 and 8-to constrain the valve toward closed position.

Member |23 is extended-see Fig. 4-and a connecting member |32 operatively connects the valve stem extension |28 to the ash guard shield, to which reference will be had hereinafter. The operative relationship between member |28 and member |40 and the associated parts will be set forth more fully hereinafter.

In Figs. 5 and 6 of the drawings, there is illustrated the interior furnace structure 220 having the ash pit 2 9, the grate structure being diagrammatically illustrated and indicated by the numeral 22|. In this form of the invention, two spray devices are illustrated. The supply pipe to these devices is indicated by the numeral 223, the automatic valve by 225, the manual regulating valve by 224, the T by 223er and the two branch pipes which directly supply the spray devices by 2231).

In this form of the invention, a member 232 is pivoted at 230 on a support member 23|. The bar 232 is operatively associated with lugs 2|8 and is caused to oscillate with the movement of the shaking member 222.

The shaking member 222 has rigidly secured to it a member 229 which is adapted to engage the head 228 of valve 225, the portion 228 being constrained toward the valve closing position by the exposed coil spring 26. Thus, when the member 222 is reciprocated for grate shaking, the ash guard shields are actuated for movement to expose the spray discharge ports and the water supplied bypipe 223 is automatically supplied to the spray device.

With reference to the several figures before mentioned, it frequently is desirable to employ water diverting spray shields other than dust guard shields on the spray devices before mentioned. In Fig. 1, since the spray device is of single character and medianly positioned, two such water diverting spray shields 50 are illustrated and these are suitably secured to the interior furnace structure 20, as at 5| and 52. In this form of the invention, it is to be understood the spray device is arranged to discharge the spray oppositely from the medianly positioned spray device and upwardly, if desired. Preferably, the upwardly directed spray does not, or

Yshould not when full pressure is applied, contact the undersurface of the hot grate. The spray diverting shields therefor also prevent the spray from contacting the interior side wall -of the ash pit and prevent rusting and corrosion thereof.

In Figs. 3 and 4, since the spraying means is of multiple character, the spray diverting shield is medianly positioned, as indicated by the numeral |50. It is suitably suspended at the rear end as at |52 and at the forward end as at |5|.. In Ythis form of the invention, it is to be understood each of the two spray devices directs the spray towards the other device and since the spray may be directed slightly upwardly, the spray diverting shield |50 interrupts the upward movement of each spray just previous to that region where it would contact the undersurface of the hot grate.

In Figs. 5 and 6 a spray diverting shield 250 is illustrated and the same is suitably suspended at its rear end as at 252 and its forward end as at 25|, and this diverting shield 250 serves the same purpose relative to the inwardly directed sprays from the two spray tubes as diverting shield |50 serves relative to the two spray tubes illustrated in Figs. 3 and 4..

While three different arrangements of the invention are illustrated and have been described in considerable detail, it is to be understood that other forms of the invention may be readily constructed by persons 'skilled in this art so that such formations will conform to the particular heat generating installation involved and to which the invention structures are to be attached.

It will also be readily apparent from the foregoing that the invention may be applied as an attachment to any standard furnace structure without departing from the broad scope of the invention. These various modifications, which necessity will dictate to be utilized, are al1 considered to be within the scope of the invention.

In Figs. 1 and 2 the spray tube structure broadly is indicated by the numeral 60 and the same is suitably secured as at 6|' at its rear end to the interior furnace structure 20.

Similarly, the two spray tubes shown in Figs. 3 and 4 are indicated by numeral |60 and are suitably supported at the rear end as at |16.|'.

Similarly, in Figs. 5 and 6, two, spray tubes 260 are suitably supported at their rear ends upon the furnace structure 22.0 asr at 26|. The forward ends of the tubes may` be suitably supported, if, as and when necessary.V Herein no support is Yillustrated because in the usual application of the invention, none is required.

In Figs. '7 and 8, there is illustrated a portion of the invention shown in Figs. 3 and 4 and in said figures, substantially the same numerals are utilized as were utilized with reference to the parts shown in said Figs. 3 and 4. In Figs. 7- and 8, there is illustrated a connection |40 between` the shaking member |22 and the valve stem. This specific structure is morey clearly illustrated in Fig. V12. In said Figs. '1 and ,8, the member |32 is suitably connected to a clamp |10 associated with an ash shield, this shield being of tubular type and being concentric with the spray tube 1|, the tube shield being indicated by numeral |12. A stationary cover |13 is clampingly mounted as at |14 upon the tube |1| and is cut away as at |15 to permit member |10 to move to and fro to carry with itthe ash shield |12 clampingly con- `nected thereto as at |16. f

The spray tube proper-see Figs. 9 and 10- indicated by the numeral |1 includes the ports `|11 which in some forms of the invention may be Vupon opposite sides of the tube as shown dotted in Fig. 9, and in other forms of the invention may be upon the right or left hand side of the tube, as required.

The ash shield or sliding tube |12 includes direction. This sliding arrangement also serves to clear the ports of accumulated ash and dust.

An outer dust guard or supplementary ash shield indicated by numeral |13 in Fig. 8, it will be remembered, is clamped to the tube |1| as at |14. The opposite end of this supplementary ash shield is reduced as at |19 and clamped to the opposite end of the tube |1| as at |80. The dust guard or ash shield |13 only partially envelops the sliding ash shield |12 and it is provided with notches |8| which register with the ports |11, these notches being spaced to correspond with the port spacing and also being provided on one or both sides of the dust guard shield, as required by the particular instance, and when upon one side of the ash shield, then the two adjacent ash shields have their notches or cutout portions |8| upon adjacent sides.

Reference Will again be had to Figs..3, 4, '1 and 8, and also Fig. 12. The block |40, before mentioned, includes notch 200 for reception of shaker bars |22 and openings 20|v for receiving bolts |9| to secure said shaker bar to the block. The block includes an aperture |82 which slidably receives the reduced stem portion |28 of the valve member having the shoulder 83, the valve member being indicated by the numeral |a.

The stem |28 includes a notch |84 of the ratchet tooth type. Slidably mounted in a bore |85 in the block |48-see Fig. 12--is a tooth |86 having a lateral extension |81 slidable in the slot |88 in the block. A spring |89 in the bore normally projects the tooth or dog |86 into contact with the stem |28. The spring is retained in the bore by the closure |90.

The shaker bar |22 is normally locked to the block as at |9| When the shaker bar is initially moved from the normal rest position, and the same is illustrated in Figs. '1 and 8, the tooth |86 which is seated in the notch |84 of the valve stem insures that the rst initial movement of the shaker bar carries with it the stem extension |28 and the valve member |25a and the ash shield on the spray tube. This opens the'valve for the discharge of the water from line |23--see Figs. 7

and 3`to the branches |23b. At the same time, member |28 through member |32 slides the inner ash shield or control tube |12 to expose the ports |11 in tube |1|.

Continued movement of the shaker bar in the same direction causes pin |81 to engage the inclined face 202 of the recess 283 in member 284 secured to valve |25 at 205. This cam engagement withdraws dog |86 from the toothed notch |84 in stem |28. Thus, approximately 5/8 to 1%, of initial shaker bar travel opens the valve and moves the inner ash shield to expose the spray ports. Approximately half that distance of additional travel automatically disconnects these parts from the shaker bar and permits shaker bar reciprocation of about 4 beyond the aforesaid initial travel without valve or shield movement.

Complete shaker bar return movement automatically reengages thel stem 28 near the last of travel thereby closing the valve and moving the inner ash shield into port shielding position..

While the invention has been illustrated and described in great detail in the foregoing specification, the same is to be considered as illustrative and not restrictive in character. The various modifications illustratedv and/or described hereinbefore as well as others which will readily suggest themselves to persons skilled in this art, are all considered to be Within the broad scope of the invention, reference being had to the appended claims.

The invention claimed isz- 1. In a furnace structure, having an ash pit, a grate thereabove and a grate shaking member', the combination of ash spraying means in said pit including a spray pipe with spray discharge ports therein directed diagonally toward the grate, said pipe being positioned beneath the grate, port guarding ash shield means, a water supply pipe to the spraying means, a valve in said supply line, and means operatively connecting the member valve and ash shield means for uncovering the ports and for spraying upon movement of the member.

2. A device as dened by claim l in which the ash spraying means is arranged along two opposite sides of the pit and directs the spray towards the center thereof, and including spray shield means centrally positioned in the pit.

3. A device as defined by claim 1 in which the ash spraying means. is centrally arrangedin the pit and directs the spray toward two opposite sides of the pit, and including spray shield means in the pit adjacent the opposite sides thereof for the purpose described.

4. In a furnace structure having an ash pit, a grate thereabove, and a grate shaking member, the combination of. ash spraying means in said pit beneath the grate and having two substantially parallel portions, each having discharge ports directing spray diagonally toward the grate, an ash guard shield juxtaposed to each portion respectively and normally covering the adjacent ports and arranged when actuated to expose same, means connecting said shields for simultaneous operation, a water sup-ply pipe to the spraying means, a valve controlling said supply pipe, and means operatively connecting the shaking member and the connecting means for exposing the several ports upon movement of the member.

5. A device as defined by claim 4, the connecting means including a pivoted bar connected to the ash guard shields. and which is Yoperatively connected to the shaking member.

r6. A device as defined by claim 4, each portion having ports discharging towards the other portion, and spray shield means in the pit and between said portions.

'7. A device as defined by claim 4, the connecting means including a pivoted bar connected to the ash guard shields and which is operatively connected to the shaking member, each portion having ports discharging towards the other portion, ports and spray shield means in the pit and between said portions.

8. In combination, a spraying device, a control valve therefor, a grate shaking member, a movable ash guard shield for the ash spraying device controlled by the valve, a valve actuating member, a shield actuating member, and means operatively connecting the two last mentioned members to the shaking member for conjoint operation with movement of the .grate shaking member.

9. In combination, an ash spraying device, a control valve therefor, a grate shaking member, a movable Vash guard shield for the ash spraying device and controlled by the valve, a valve actuating member, a shield actuating member, and means operatively connecting the two last mentioned members to the shaking member for conjoint movement with the movement of the grate shaking member, said means maintaining such connection only during the initial portion of the grate shaking member movement for valve opening and ash shield movement and thereafter disconnecting same from the grate shaking member for further movement of the latter without continued movement of the ash shield and valve actuating members.

10. In combination, an ash spraying device, a control valve therefor, a grate shaking member, a movable ash guard shield for the ash spraying device and controlled by the valve, a valve actuating member, a shield actuating member, and means operatively connecting the two last mentioned members to the shaking member for conjoint movement with the movement of the grate shaking member, said mea-ns effecting such connection near the end of the movement of the grate shaking member to return the grate to normal position for movement of the actuating members to close the valve and move the ash shield into shielding position.

1l. In combination, an ash spraying device, a control valve therefor, a grate shaking member, a movable ash guard shield for the ash spraying device and controlled by the valve, a

valve actuating member, a shield actuating member, and means operatively connecting the two last mentioned members to the shaking member `for conjoint movement with the movement of the grate shaking member, said means maintaining such connection only during the initial portion of the grate shaking member movement for valve opening and ash shield movement and thereafter disconnecting same from the grate shaking member for further movement of the latter without continued movement of the ash shield and valve actuating members, and said means eiecting reconnection near the end of the movement of the grate shaking member to return the grate to normal position for movement of the actuating members to close the valve and move the ash shield into shielding position.

12. In a spraying device, the combination of an elongated spray tube having Ylongitudinally aligned spaced spray ports therein, an elongated A tubular member movable relative thereto and including elongated openings therethrough in similarly aligned and spaced relation for registration with said spray ports, and a. stationary open tube shield thereon and rigid relative to the spray tube and including notches therein in similarly aligned and spaced relation and registering with the spray ports.

13. In a structure having an ash pit, a fuel supporting shakable grate therebeneath, and a 'i grate shaking member, the combination of ash spraying means in said ash pit below the grate, a supply pipe, a valve in said supply pipe, means operatively connecting the member and valve for spraying when shaking, the ash spraying means l cut-off or closed position and having an exposed operating portion, and means operable by the shaking member for opening and closing the valve, the ash spraying means having spraying ports, and ash guard shield means for covering the spraying ports and operable by the shaking member for exposing the spraying ports when the valve is opened and covering the spraying ports when the valve is closed.

EMIL WEBER. i 

